In reading order
The Mystery Series: The Mystery of the Burnt Cottage
Enid Blyton
The Mystery Series: The Mystery of the Disappearing Cat
Enid Blyton
The Mystery Series: The Mystery of the Secret Room
Enid Blyton
The Mystery Series: The Mystery of the Spiteful Letters
Enid Blyton
The Mystery Series: The Mystery of the Missing Necklace
Enid Blyton
The Mystery Series: The Mystery of the Hidden House
Enid Blyton
The Mystery Series: The Mystery of the Pantomime Cat
Enid Blyton
The Mystery Series: The Mystery of the Invisible Thief
Enid Blyton
The Mystery Series: The Mystery of the Vanished Prince
Enid Blyton
The Mystery Series: The Mystery of the Strange Bundle
Enid Blyton
The Mystery Series: The Mystery of Holly Lane
Enid Blyton
The Mystery Series: The Mystery of Tally-Ho Cottage
Enid Blyton
The Mystery Series: The Mystery of the Missing Man
Enid Blyton
The Mystery Series: The Mystery of the Strange Messages
Enid Blyton
The Mystery Series: The Mystery of Banshee Towers
Enid Blyton